Finding the Fourth Proportional to 16,807.91, 25,215.49 and 5,120.82

Step by Step Solution

1. Step 1: Write the proportion equation
   16,807.91 : 25,215.49 = 5,120.82 : x
2. Step 2: Convert to fraction form
   16,807.91/25,215.49 = 5,120.82/x
3. Step 3: Cross multiply
   16,807.91x = 25,215.49 × 5,120.82
4. Step 4: Simplify right side
   16,807.91x = 129,123,959.90
5. Step 5: Solve for x
   x = 129,123,959.90/16,807.91
6. Step 6: Final answer
   x = 7,682.34